Portelli Marco, Militi Angela, Nucera Riccardo, Cicciù Marco, Gherlone Enrico, Lucchese Alessandra
School of Dentistry, Department of Biomedical Sciences, Dentistry and Morphological and Functional Imaging, University of Messina, Messina, Italy -
Minerva Stomatol. 2016 Dec;65(6):403-411. Epub 2016 Jun 30.
Congenitally missing teeth are one of the most common tooth anomalies associated to therapeutic sets of problems. Orthodontists should consider these clinical cases because management often requires an integrated orthodontic and restorative approach. In the present study authors reported a therapy note referred to a 14-year-old male patient affected by missing maxillary lateral incisors, bilateral dental Class II and deep bite, treated in 2009 at the Department of Orthodontics of the University of Messina. An orthodontic treatment has been planned with the aim of distalize maxillary molar and the following opening of the spaces necessary for the prosthetic restoration of missing lateral incisor. For the distalization of maxillary molars has been decided to use a Distal Jet supported by miniscrew (Distal-Screw, American Orthodontics, Sheboygan, WI, USA). After seven months of treatment with distal screw, maxillary molar distalization was completed, obtaining a bilateral molar Class I. A multi-bracket orthodontic appliance was bonded in the upper and lower arch using Empower Brackets (American Orthodontics). Class II molar relationship has been over-corrected to Class I in about seven months. The orientation of the force vector resulted in a tipping and rotation of the first molars, without significant vertical changes. Distal Jet reinforced with screws seems to be effective in molar distalization without any type of side effects. The advantages of this device were the absence of patient compliance, relatively predictable outcomes, favorable esthetics, possibility of different activations in each side.
先天性缺牙是与一系列治疗问题相关的最常见牙齿异常之一。正畸医生应考虑这些临床病例，因为治疗通常需要正畸和修复的综合方法。在本研究中，作者报告了一份治疗记录，涉及一名14岁男性患者，该患者患有上颌侧切牙缺失、双侧II类牙合和深覆牙合，于2009年在墨西拿大学正畸科接受治疗。计划进行正畸治疗，目的是使上颌磨牙远中移动，并为缺失侧切牙的修复开辟必要的间隙。对于上颌磨牙的远中移动，决定使用由微型螺钉支撑的远中喷射器（Distal-Screw，美国正畸公司，美国威斯康星州希博伊根）。使用远中螺钉治疗七个月后，上颌磨牙远中移动完成，获得双侧磨牙I类关系。使用Empower托槽（美国正畸公司）在上、下牙弓粘结多托槽正畸矫治器。II类磨牙关系在大约七个月内过度矫正为I类。力向量的方向导致第一磨牙倾斜和旋转，没有明显的垂直变化。用螺钉加强的远中喷射器在磨牙远中移动方面似乎有效，且没有任何类型的副作用。该装置的优点是无需患者配合、结果相对可预测、美观良好、两侧可进行不同的激活。
